Process for the production of polymers containing isocyanurate and or oxazolidone linkages
US4568703A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 27, 1984 |
| Grant date | Feb 4, 1986 |
| Priority date | — |
| Expiry date | Jul 27, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/902
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Titanium compounds of the formula Ti(OX).sub.4 or Ti((O--R.sub.2).sub.2 NR.sub.3).sub.2, where (a) X is selected from the group comprising --R.sub.1, --R.sub.2 --OH, --(R.sub.2 --O).sub.n --OH, --R.sub.2 N(R.sub.3).sub.2, and --R.sub.2 --N(R.sub.2)(R.sub.3)OH; (b) R.sub.1 is a C.sub.5 -C.sub.8 alkyl group, R.sub.2 is a C.sub.2 -C.sub.4 alkylene group and R.sub.3 is either --CH.sub.3 or --CH.sub.2 CH.sub.3 ; and (c) n=1-20, are catalysts for the trimerization of isocyanates to isocyanurates and for the formation of 2-oxazolidones from epoxides and isocyanates. The catalysts may also be used to produce poly(isocyanurates), poly(2-oxazolidones), poly(2-oxazolidone/isocyanurates) and polyurethanes containing isocyanurate and or 2-oxazolidone linkages from the appropriate polyfunctional feedstocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.